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Descriptions

W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Poa nitidespiculata

HABIT Perennial. Stolons present. Butt sheaths herbaceous; persistent and investing base of culm; with compacted dead sheaths. Culms erect; 15–30 cm long; 2–3 -noded; rooting from lower nodes. Culm-internodes terete; glandular; smooth. Culm-nodes glabrous. Lateral branches lacking. Leaves mostly basal. Leaf-sheaths tight; smooth; glabrous on surface, or pubescent. Ligule an eciliate membrane; 4 mm long; acute. Leaf-blades filiform; convolute; 6–12 cm long; 2.5 mm wide. Leaf-blade surface scabrous; rough on both sides. Leaf-blade margins scabrous; ciliate; hairy at base. Leaf-blade apex hardened.

INFLORESCENCE Inflorescence a panicle. Peduncle smooth.

Panicle open; pyramidal; 8–16 cm long; 4–8 cm wide. Primary panicle branches spreading; 2 -nate. Panicle branches capillary; flexuous; scabrous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 3–4 mm long.

FERTILE SPIKELETS Spikelets comprising 2–3 fertile florets; with diminished florets at the apex. Spikelets elliptic, or oblong; laterally compressed; 7 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes smooth; pubescent. Floret callus woolly.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 4.5–4.75 mm long; 0.9 length of upper glume; membranous; much thinner on margins; glandular; 1-keeled; 3 -veined. Lower glume primary vein scabrous. Lower glume apex acute. Upper glume oblong; 5 mm long; 0.7–0.8 length of adjacent fertile lemma; membranous; with hyaline margins; glandular; 1-keeled; 3 -veined. Upper glume primary vein scabrous. Upper glume apex acute.

FLORETS Fertile lemma oblong; elliptic in profile; 6–6.5 mm long; membranous; much thinner on margins; glaucous; shiny; keeled; 5 -veined. Lemma midvein scabrous; ciliate; hairy below. Lemma surface pubescent; hairy below; hairy on veins. Lemma apex obtuse. Palea 0.9 length of lemma. Palea keels scabrous; adorned above. Palea surface pubescent; hairy on back. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; membranous. Anthers 3; 2.5 mm long.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform.

DISTRIBUTION Asia-temperate: China. Asia-tropical: India.

NOTES Poeae. Bor.

Please cite this publication as detailed in How to Cite Version: 3rd February 2016.